Hi guys. My wireless connection woes are never far away

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OK, so I have a wireless connection that has been working fine for almost a year.
Yesterday, I restart my computer, and the connection is connecting...disconnecting...connecting...disconnecting...as so on!
This is only when I am actually browsing the Internet. It never disconnects when the connection is idle.
I have tried changing channels, and I don't think it can be interference, because no matter how close to the WAP I am, the connection keeps connecting and disconnecting.
Also, I tried connecting my WAP directly to my laptop and even the LAN connection kept disconnecting and reconnecting in the same manner! I even tried connecting the WAP to another PC and still, the same dis-reconnecting difficulty.
What to do? Is the WAP faulty? I notice on the WAP the RX/TX light is on and the Link light is on, then (when it disconnects) one light goes off, the other stays on, then the other goes on and the first one goes off, and this goes on and on and then they both stay on. After 10 seconds the pattern repeats itself...
What on earth is going on?
By the way, my WAP is connected to a router which is connected to my cable modem. The wired connection to the router works perfectly, but when the WAP is involved this happens (dis-reconnecting) as I said, even when PC/laptop is hard wired into the WAP.
???
Help...please!
It was working fine for a year, and then this?
I appreciate any help in advance (as usual

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